package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    @Override
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {

        ShoppingCart shoppingCart=new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if (list != null && list.size()>0){
            ShoppingCart cart = list.get(0);
            cart.setNumber(cart.getNumber()+1);

            shoppingCartMapper.updateNumberById(cart);
        } else {
           Long dishId= shoppingCartDTO.getDishId();
           if (dishId!=null){
               Dish dish = dishMapper.getById(dishId);
               shoppingCart.setName(dish.getName());
               shoppingCart.setImage(dish.getImage());
               shoppingCart.setAmount(dish.getPrice());

               shoppingCart.setNumber(1);
               shoppingCart.setCreateTime(LocalDateTime.now());
           }else {
               Long setmealId = shoppingCartDTO.getSetmealId();

               Setmeal setmeal = setmealMapper.getById(setmealId);
               shoppingCart.setName(setmeal.getName());
               shoppingCart.setImage(setmeal.getImage());
               shoppingCart.setAmount(setmeal.getPrice());

               shoppingCart.setNumber(1);
               shoppingCart.setCreateTime(LocalDateTime.now());
           }
           shoppingCartMapper.insert(shoppingCart);




        }
    }

    @Override
    public List<ShoppingCart> showShoppingCart() {
        Long userId = BaseContext.getCurrentId();//获取当前微信用户的id
        ShoppingCart shoppingCart=ShoppingCart.builder()
                .userId(userId)
                .build();
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }

    @Override
    public void cleanShoppingCart() {
        Long userId = BaseContext.getCurrentId();//获取当前微信用户的id
        shoppingCartMapper.deleteByUserId(userId);
    }

    @Override
    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        shoppingCart.setUserId(BaseContext.getCurrentId());
        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        if (list!=null && list.size()>0){
            shoppingCart=list.get(0);
            Integer number = shoppingCart.getNumber();
            if (number==1){
                shoppingCartMapper.deleteById(shoppingCart.getId());
            }else {
                shoppingCart.setNumber(shoppingCart.getNumber()-1);
                shoppingCartMapper.updateNumberById(shoppingCart);
            }
        }
    }
}
